Padlock



Jan. 31. 1933. l s. R FRAIM 1,895,655.

PADLOCK Filed Aug. 7, 1930 Jim# l I f 4a 45537 ga Maw@ Patented Jan. 31, 1933 SAMUEL R. FRAIM, or LANCASTER, 1EmisYLvANIAY PADLO CK Application me@ August 7, 1930. serial No. 473,562. f

One purpose of my invention is to facilitate padlock manufacture by formation of the padlock body from a solid block Aand separate assembly of the complete locking mecha- 5 nism for inclusion within it.

A further purpose is to provide a new and desirable lock assembly for easy insertion in a straight cylindrical bore of a padlock body.

' A further purpose is to' concentrica'lly surround a key plug with an outer casing, to transversely guide a bolt in the end of the casing and to fit the assembled unit inside a straight bore in the body of'a padlock.

A further purpose is to preliminarily retain a cylindrical casing about a disc tumbler plug for the double purpose of holding them together for assemblageand of limiting the angular movement of the disc tumbler plug.

A further purpose is to provide an arcuate pin and slot connection between a barrel or key plug and a casing, adapted to be mount' e ed as a lock-operating unit in the body of a padlock.

A further purpose is to adapt a disc tumbler locking plug to padlock use. y

A further purpose is to additionally carry a locking boltin a plug lock for insertion within an upwardly directed bottom bore of the padlock body.

A further purpose is to operate a transversely-spring-pressed bolt for the short arm or toe of the shackle of a padlock in the upper end of a light casing surrounding a key plug having operative connection with the bolt and angular lock and key connection with the casing, preferably including tumblers of the disc type.

A further purpose is to provide a novel 40 form of padlock for easy manufacture and assembly and including `a body having a straight bore and an insert unit therein comprising a transverse bolt, an outer casing mounting and guiding the bolt and a disc tumbler key plug inside the casing adapted to be turned with respect to the casingv when a suitable key has been inserted in the plug.

Further purposes will appear in the speciication and in the claims.

.I have elected to illustrate one main form onlyuof the manyeforms of ,myy invention, showing however aminor modificationk and selecting a main form that is practical and elicient'in operationv and which well 4illustrates the principles involved. f

Figure 1 is aside elevationfof apa'dlock embodying a desirableform of my invention, the shackle being shown closed in full line and open in doteand-dash line.` Y Y V Figure 2 is a side elevationof Figure l. Figure Sisa bottom plan View of Figure 1. Figure 4 is a vertical ,sectionv taken' upon the line 4 4 of Figure 2, the'shackle and' plugy being notsectioned anda key inserted in the barrel being shown in `dot-and-dash. Fi ure 5 is av vertical sectiontaken upon he line 5 5 of Figure 4 without sectioning the barrel.

Figure is a horizontal section taken upon the line 6 6 of Figure 4.

Figure 7 is a horizontal section taken upon the line 7 7 of Figure 4. j

Figure 8 is a" horizontal section taken'` upon the line 8 8 of Figure 4.

Figures 9 and 9a are'upper and lower` perf- I spective views of a detail, being al bolt,y ele(-` ment of an insert unit. l Figure 10 is a perspective view of'al detail of the insert unit, the sleeve or casing element, Y y

lock member, including the bolt of Figure 9, '99

the casingof Figure 10y andthe key "plug of Figure 11. I Figure 14 is a top plan'view of Figure 12?. Figure 15 is a vertical section corr'espond ing generally to Figure 5 butmodifiedA with respect to a minor detail. '1

Like numerals refer vto-.likeparts all figures. y I

Describing in illustration and not inlimitation and referring to the drawing:

f Referring to the drawing, the lock comprises a body 20, shackle 21 and lock insert 22. Y

The body 2O preferably comprises a short length cut from a continuous solid bar, the section being bored in Va longitudinal direction from one end. (the top of the body) at 23 and 24 to receive' the long and short ends i of the shackle 2l and bored upwardly from the other end (the bottom) at 25 tor receive the lock insert 22,-the `upward bore 25 for the lnsert preferably cutting into the downward bore 2 4 for the short end of the shackle in order to permit a spring bolt 26 at the upper end ofthe insert to latch intoan' inwardly directed notch 27 at the toe of the shackle.

The longer 'arm of the shackle is circumferentially grooved near its lower end at 28 and 'one side of thek arm isflattened at 29 upwardly'from the bottom of the groove for a distance equal to the desired upward :opening strokev of the shackle,a pin30 through vthe body havingfa'portion of its'thickness extending'y across thev flat side.

Whenthe lock is opened the shackle is free Vto move upwardly until stopped by ythe head at'the lower side of the groove 28 engaging i the pin 30, after which theopen shackle is 'freevto rotate upon its long arm, the groove 28 alining with the lpin 30,r and the pin kand groove connection preventing downward movement of the shackle in the usual wayeX- cept when the short arm of the shackle is in lproper alinement with the'hole4 24 of the body. l The insertunit 22 includes an inner plug (barrel) .31' (Figure ll) carrying disc tumblers, an outer shellor sleeve 32 (Figure l0) and thebolt`26 (Figures9 and9a) mounted on', the upper end ofthe sleeveand presenting a downwardly extending dog 33 to an operating cam 34 on the top of the barrel 31. The intermediate portion of the barrel inn vvcludes'fan assembly of tumbler discs 35 springpressed to normally project outwardly from oneside of the plug and adapted to be moved inwardly by the insertion of a suitable keyv to lie even with the circumference of Vtheplug,

or atk least, ynot-to project beyond this circumference. i

The barrely is provided with a head or flangey 36 atits lower end adapted to circumferentially fit and close the entrance. into the bore 25 in the body.. f

The sleeve 32 is cut away at the locking ends of the tumbler discs to permit the ends of these discs to normally project outwardly across thethickne'ss o f the shell 'to lock the barrel from turning with respect to the sleeve if the key is not inserted in the barrel.

While obviouslyl' may .provide lthe .ends

1 of the tumbler discs with individual arcuate keyhole slots in the shell I usually prefer to provide a single keyway slot 37`cutfl`o`ngitudinally upwardly fromthe'lower end of the Vmembers during the insertion of the keyaiid y l downward flare to prevent upward movement of the correspondingly iared boltin adirecshell in registry with kthe'locking ends of the disc tumbler members 35, and may also provide a corresponding slot 38 upwardly from the lower end of the shell at the opposite ends of the tumbler discs. Y

'Normally after assembly of the sleeve and plug the locking ends of the tumblers 35 project into the slot 37 to prevent angular movement of the' plug or barrel with respect to the sleeve.

Insertion of a key V39.moves the tumbler discs longitudinally back in the usual way, the rearward ends of one or more of the tumblers ywith usual length of tumblers momentarily moving out beyond'the Vline .of

so the barrel into the slot 380m the other side of the sleeve, this slot functioning merelylto permit fthe inward movement of the disc being optionally vdispensed with if the rear- ,wardends of thetumblers are made suiciently short 'to avoid the needV for theirl projection beyond the outer circumference ofthe .l

plug' during key insertion.

,The barrel in so far as it includes the trans'- versely mounted tumblers 35, adapted to be retracted against individual springs 40 by the insertion yof the lkey at a keyhole 4l, the key variantly i positioning surfaces 42'- of the tumbler to .register the tumblers in retracted l position, is of the prior art and well known.

The upper end of the shell or sleeve 32 includes a vtransverse guide 43for the bolt 26,

the guideway having desirably a suitable tion longitudinal of the sleeve. l.

.This however isvalso somewhat a matterof preference, the principal advantage beinga' holding of the bolt in the insert unit before i325 The bolt 26 is longitudinally recessed at 45 to receiveone end of a spring 46, the other end ofthe spring engaging the body and pressing the bolt outwardly as best seen in Figure 4, to make latch-engagement withthe notch 329 on the short end or toe ofthe' shackle when this end is inserted into the body.

\ Desirably the lower forward side of the bolt is upwardly recessedat 47 to shorten the requisite downward extension of the shackle endandY to lessenthe downward overlap ofV this end withV respect to the. sleeve, the sleeve being shown cut away arcuatelyat 48v to receive the end of the-shackle.. f The sleeve is hollow upwardly from the l S1230 i i bottom to receive and iit the upper portion of the plug and is perforated longitudinally at 49 into the transverse guideway 43 to permit cooperating engagement and movement of the downwardly directed dog 33 upon the bolt and the upwardly directed cam 34 on the upper end of the barrel.

I preferably form the barrel with respect to the cam and doe` to limit the angular movement of the barrel with respect to the sleeve 1to that needed to satisfactorily operate the ock.

As seen in Figure 12 I have made the cam of semi-circular section, encasing it except for a diametral portion engaging the dog with the sleeve to limit the range of movement of the barrel.

It will be seen that I have provided a form of lock insert particularly well adapted to use in the manufacture of padlocks having bodies comprising successive sections of a solid bar, bored on one side to receive the ends of the shackle and on the other to receive my insert, the insert including alight shell carrying a bolt at one end and a barrel inside the shell having suitable operative connection with the bolt and angularly locking with the shell.

I preferably make this insert as a unit, with the constituent members keeping their assembled positions in the unit unless definitely withdrawn, and as illustrated in Figures 12 and 13 may desirably provide a slot 50 and pin 51 connection between the barrel and shell as indicated which normally prevents longitudinal withdrawal of the barrel from the shell but permits angular movement of the barrel with respect to the shell to operate the bolt. It also acts as an aligning limit to with the slots 37, 38.

I may prevent removal of the shell from the body in a. number of different ways, illustrating a suitable perforation 52 in the shell adapted to receive a pin 53 through the body after the shell has been inserted.

Gptionally I may provide sufficient resistance to angular movement between the shell and the body by making a light driving lit between the shell and body.

In Figure 4L I illustrate the barrel prevented from longitudinal withdrawal from the body and therefore from the shell after the unit has been inserted by a pin 54 that extends laterally into a groove 55 around the flange 36 of the body.

The pin and groove connection is sui'iiciently loose to permit angular movement of the plug and if the fit between the shell and body be suificiently tight to prevent angular movement ofthe shell with respect to the body I may dispense with other fastening between the assembled units than the single pin 54.

If it be deemed preferable to make the Yters Patent is: ensure registry of the tumbler extensions 35 shell lit `loosely into the body Imay provide another or a diiferent pin connection vbetween the body and shell, a pin 53 (Figure,

15) forvexample` ofthe bodysuitably projecting through the shell to extend into an,v

'arcuate groove 56 in a portion ofthe barrel disc projection 56 makesf'it .engage with a\ shoulder 59 upon the casing. .giving an addi-` tionalmeans of checking rotation of the plug Y within the casing to insure registration of the tumbler extensions 35- with. the groove 37. In the illustration in Figure 12 this is v: supplemental to the slot and pin connection between the sleeve and plug butmay be used instead of it. Either or both insure freedom from frictional engagement ofthe tumbler extensions 35 with the .side wall of the slot Vat the same time that the key is in position forv removal. n

In view ofA my invention and disclosure variations and 'modifications to meetindividual whim orparticular need will doubtless become evident to others skilled inthe art, to obtain all or part of the benefits of myinvention without copying the-structure shown, and I, therefore, claim all such in soI far as they fall within the reasonable spirit and:

scope of my invention. t

Having thus described `my invention, what I claim as new and desire to secureby Let- 1. A padlock. including a shackle, a body, mounting the shackle at one end and having a straight cylindrical bore from the other end andan insert within the bore comprising a transverse bolt, an outer casing mounting vand guiding the bolt and a disc tumbler keyl Vplug inside 'the casing adapted to be turned with respect to the casing when a suitable key has been inserted in the plug. Y' f 2. A padlock body having openings for the long and short shackle legs in one end`IV and for a lock assembly inthe other end, the short shackle opening communicating with the lock assembly opening, a shackle for the shackle opening and a lock assembly for the.. assembly opening, the assembly comprising a disc tumbler plug, a casing about the plug, in use iixed within the body, slotted to permit locking engagement of the discs and carrying a transverse bolt guide and a reo ila

spring-pressed bolt transversely movableW within the guide and controlled by the po-v sition of the plug, the opening at the said other end comprising a straight cylindrical bore, and the assembly circumferentially fitassembled unit at the open endthereof;v

an padmk bdyhaving Openings for i the long and short'shackle legs inone end and :for a'lock assemblyin the Vvother end, 'the short shackle opening communicating with the lock assembly opening, .a shackle for the shackle opening and a loc-k assembly for the assembly opening comprising al disc tumbler plug, a casing about the plug concentric with the plug,in use held against movement within vthe-body, aV transversely guided bolt carried .by the 'casing .and cam connections between the plug and bolt controlling the position of the bolt with turning movement of the plugtheop'ening at the said other end comprising a straight cylindricalvbore, and the assembly circumferentially fitting the bore and adapted for insertion' as an assembled unit at the open end thereof.

4; A padlock bodyhavlng openingsfor the long and short, shackle legs in one end and for a lock assembly in the other end, the short shackle opening communicating With the lock assembly opening, a shackle for the shackle opening and a lock assembly for the assembly openingcomprising a disc tumbler plug, acasing about the plug concentric with f the plug, extending beyond. it: and transversely slotted to form a bolt guide'L and a bolt f in the gu-ide,fthe opening at the said other end comprising la straight cylindrical bore, and the assembly,'circumferentially fitting the bore andadapted for insertion as an assembled unit at the open end thereof.-

5. A padlock body having openings for l'ong and short shackle-legs in one end and for a lock assemblyin the` other end', the short shackle opening communicating vwith the lock assembly opening, a shackle for/che shackle openings and a lock assembly for the assembly opening comprising a tumbler plug,

a casing about the plug concentricA With the plug, extending beyond it and transversely v i slotted to form a bolt guide, a bolt inthe' f guide,` andthe assembly litting the contour lof the opening in the body and adapted for v insertion as aunit into the body opening.

1 u SAMUEL R. FRAIM. 

